drivers/media/dvb/siano/smsdvb.c

   1 /*
   2  *  Driver for the Siano SMS10xx USB dongle
   3  *
   4  *  author: Anatoly Greenblat
   5  *
   6  *  Copyright (c), 2005-2008 Siano Mobile Silicon, Inc.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 3 as
  10  *  published by the Free Software Foundation;
  11  *
  12  *  Software distributed under the License is distributed on an "AS IS"
  13  *  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
  14  *
  15  *  See the GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24
  25 #include "smscoreapi.h"
  26
  27 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  28
  29 struct list_head g_smsdvb_clients;
  30 kmutex_t g_smsdvb_clientslock;
  31
  32 int smsdvb_onresponse(void *context, smscore_buffer_t *cb)
  33 {
  34         smsdvb_client_t *client = (smsdvb_client_t *) context;
  35         SmsMsgHdr_ST *phdr = (SmsMsgHdr_ST *)(((u8 *) cb->p) + cb->offset);
  36
  37         switch (phdr->msgType) {
  38         case MSG_SMS_DVBT_BDA_DATA:
  39                 dvb_dmx_swfilter(&client->demux, (u8 *)(phdr + 1),
  40                                  cb->size - sizeof(SmsMsgHdr_ST));
  41                 break;
  42
  43         case MSG_SMS_RF_TUNE_RES:
  44                 complete(&client->tune_done);
  45                 break;
  46
  47         case MSG_SMS_GET_STATISTICS_RES:
  48         {
  49                 SmsMsgStatisticsInfo_ST *p =
  50                         (SmsMsgStatisticsInfo_ST *)(phdr + 1);
  51
  52                 if (p->Stat.IsDemodLocked) {
  53                         client->fe_status = FE_HAS_SIGNAL |
  54                                             FE_HAS_CARRIER |
  55                                             FE_HAS_VITERBI |
  56                                             FE_HAS_SYNC |
  57                                             FE_HAS_LOCK;
  58
  59                         client->fe_snr = p->Stat.SNR;
  60                         client->fe_ber = p->Stat.BER;
  61
  62                         if (p->Stat.InBandPwr < -95)
  63                                 client->fe_signal_strength = 0;
  64                         else if (p->Stat.InBandPwr > -29)
  65                                 client->fe_signal_strength = 100;
  66                         else
  67                                 client->fe_signal_strength =
  68                                         (p->Stat.InBandPwr + 95) * 3 / 2;
  69                 } else {
  70                         client->fe_status = 0;
  71                         client->fe_snr =
  72                         client->fe_ber =
  73                         client->fe_signal_strength = 0;
  74                 }
  75
  76                 complete(&client->stat_done);
  77                 break;
  78         } }
  79
  80         smscore_putbuffer(client->coredev, cb);
  81
  82         return 0;
  83 }
  84
  85 void smsdvb_unregister_client(smsdvb_client_t *client)
  86 {
  87         /* must be called under clientslock */
  88
  89         list_del(&client->entry);
  90
  91         smscore_unregister_client(client->smsclient);
  92         dvb_unregister_frontend(&client->frontend);
  93         dvb_dmxdev_release(&client->dmxdev);
  94         dvb_dmx_release(&client->demux);
  95         dvb_unregister_adapter(&client->adapter);
  96         kfree(client);
  97 }
  98
  99 void smsdvb_onremove(void *context)
 100 {
 101         kmutex_lock(&g_smsdvb_clientslock);
 102
 103         smsdvb_unregister_client((smsdvb_client_t *) context);
 104
 105         kmutex_unlock(&g_smsdvb_clientslock);
 106 }
 107
 108 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
 109 {
 110         smsdvb_client_t *client =
 111                 container_of(feed->demux, smsdvb_client_t, demux);
 112         SmsMsgData_ST PidMsg;
 113
 114         printk("%s add pid %d(%x)\n", __func__, feed->pid, feed->pid);
 115
 116         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 117         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 118         PidMsg.xMsgHeader.msgFlags = 0;
 119         PidMsg.xMsgHeader.msgType  = MSG_SMS_ADD_PID_FILTER_REQ;
 120         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 121         PidMsg.msgData[0] = feed->pid;
 122
 123         return smsclient_sendrequest(client->smsclient,
 124                                      &PidMsg, sizeof(PidMsg));
 125 }
 126
 127 static int smsdvb_stop_feed(struct dvb_demux_feed *feed)
 128 {
 129         smsdvb_client_t *client =
 130                 container_of(feed->demux, smsdvb_client_t, demux);
 131         SmsMsgData_ST PidMsg;
 132
 133         printk("%s remove pid %d(%x)\n", __func__, feed->pid, feed->pid);
 134
 135         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 136         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 137         PidMsg.xMsgHeader.msgFlags = 0;
 138         PidMsg.xMsgHeader.msgType  = MSG_SMS_REMOVE_PID_FILTER_REQ;
 139         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 140         PidMsg.msgData[0] = feed->pid;
 141
 142         return smsclient_sendrequest(client->smsclient,
 143                                      &PidMsg, sizeof(PidMsg));
 144 }
 145
 146 static int smsdvb_sendrequest_and_wait(smsdvb_client_t *client,
 147                                         void *buffer, size_t size,
 148                                         struct completion *completion)
 149 {
 150         int rc = smsclient_sendrequest(client->smsclient, buffer, size);
 151         if (rc < 0)
 152                 return rc;
 153
 154         return wait_for_completion_timeout(completion,
 155                                            msecs_to_jiffies(2000)) ?
 156                                                 0 : -ETIME;
 157 }
 158
 159 static int smsdvb_send_statistics_request(smsdvb_client_t *client)
 160 {
 161         SmsMsgHdr_ST Msg = { MSG_SMS_GET_STATISTICS_REQ,
 162                              DVBT_BDA_CONTROL_MSG_ID,
 163                              HIF_TASK, sizeof(SmsMsgHdr_ST), 0 };
 164         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 165                                            &client->stat_done);
 166 }
 167
 168 static int smsdvb_read_status(struct dvb_frontend *fe, fe_status_t *stat)
 169 {
 170         smsdvb_client_t *client = container_of(fe, smsdvb_client_t, frontend);
 171         int rc = smsdvb_send_statistics_request(client);
 172
 173         if (!rc)
 174                 *stat = client->fe_status;
 175
 176         return rc;
 177 }
 178
 179 static int smsdvb_read_ber(struct dvb_frontend *fe, u32 *ber)
 180 {
 181         smsdvb_client_t *client = container_of(fe, smsdvb_client_t, frontend);
 182         int rc = smsdvb_send_statistics_request(client);
 183
 184         if (!rc)
 185                 *ber = client->fe_ber;
 186
 187         return rc;
 188 }
 189
 190 static int smsdvb_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 191 {
 192         smsdvb_client_t *client = container_of(fe, smsdvb_client_t, frontend);
 193         int rc = smsdvb_send_statistics_request(client);
 194
 195         if (!rc)
 196                 *strength = client->fe_signal_strength;
 197
 198         return rc;
 199 }
 200
 201 static int smsdvb_read_snr(struct dvb_frontend *fe, u16 *snr)
 202 {
 203         smsdvb_client_t *client = container_of(fe, smsdvb_client_t, frontend);
 204         int rc = smsdvb_send_statistics_request(client);
 205
 206         if (!rc)
 207                 *snr = client->fe_snr;
 208
 209         return rc;
 210 }
 211
 212 static int smsdvb_get_tune_settings(struct dvb_frontend *fe,
 213                                     struct dvb_frontend_tune_settings *tune)
 214 {
 215         printk("%s\n", __func__);
 216
 217         tune->min_delay_ms = 400;
 218         tune->step_size = 250000;
 219         tune->max_drift = 0;
 220         return 0;
 221 }
 222
 223 static int smsdvb_set_frontend(struct dvb_frontend *fe,
 224                                struct dvb_frontend_parameters *fep)
 225 {
 226         smsdvb_client_t *client = container_of(fe, smsdvb_client_t, frontend);
 227
 228         struct
 229         {
 230                 SmsMsgHdr_ST    Msg;
 231                 u32             Data[3];
 232         } Msg;
 233
 234         Msg.Msg.msgSrcId  = DVBT_BDA_CONTROL_MSG_ID;
 235         Msg.Msg.msgDstId  = HIF_TASK;
 236         Msg.Msg.msgFlags  = 0;
 237         Msg.Msg.msgType   = MSG_SMS_RF_TUNE_REQ;
 238         Msg.Msg.msgLength = sizeof(Msg);
 239         Msg.Data[0] = fep->frequency;
 240         Msg.Data[2] = 12000000;
 241
 242         printk("%s freq %d band %d\n", __func__,
 243                fep->frequency, fep->u.ofdm.bandwidth);
 244
 245         switch (fep->u.ofdm.bandwidth) {
 246         case BANDWIDTH_8_MHZ: Msg.Data[1] = BW_8_MHZ; break;
 247         case BANDWIDTH_7_MHZ: Msg.Data[1] = BW_7_MHZ; break;
 248         case BANDWIDTH_6_MHZ: Msg.Data[1] = BW_6_MHZ; break;
 249         case BANDWIDTH_AUTO: return -EOPNOTSUPP;
 250         default: return -EINVAL;
 251         }
 252
 253         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 254                                            &client->tune_done);
 255 }
 256
 257 static int smsdvb_get_frontend(struct dvb_frontend *fe,
 258                                struct dvb_frontend_parameters *fep)
 259 {
 260         smsdvb_client_t *client = container_of(fe, smsdvb_client_t, frontend);
 261
 262         printk("%s\n", __func__);
 263
 264         /* todo: */
 265         memcpy(fep, &client->fe_params,
 266                sizeof(struct dvb_frontend_parameters));
 267         return 0;
 268 }
 269
 270 static void smsdvb_release(struct dvb_frontend *fe)
 271 {
 272         /* do nothing */
 273 }
 274
 275 static struct dvb_frontend_ops smsdvb_fe_ops = {
 276         .info = {
 277                 .name                   = "Siano Mobile Digital SMS10xx",
 278                 .type                   = FE_OFDM,
 279                 .frequency_min          = 44250000,
 280                 .frequency_max          = 867250000,
 281                 .frequency_stepsize     = 250000,
 282                 .caps = FE_CAN_INVERSION_AUTO |
 283                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 284                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 285                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
 286                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 287                         FE_CAN_GUARD_INTERVAL_AUTO |
 288                         FE_CAN_RECOVER |
 289                         FE_CAN_HIERARCHY_AUTO,
 290         },
 291
 292         .release = smsdvb_release,
 293
 294         .set_frontend = smsdvb_set_frontend,
 295         .get_frontend = smsdvb_get_frontend,
 296         .get_tune_settings = smsdvb_get_tune_settings,
 297
 298         .read_status = smsdvb_read_status,
 299         .read_ber = smsdvb_read_ber,
 300         .read_signal_strength = smsdvb_read_signal_strength,
 301         .read_snr = smsdvb_read_snr,
 302 };
 303
 304 int smsdvb_hotplug(smscore_device_t *coredev,
 305                    struct device *device, int arrival)
 306 {
 307         smsclient_params_t params;
 308         smsdvb_client_t *client;
 309         int rc;
 310
 311         /* device removal handled by onremove callback */
 312         if (!arrival)
 313                 return 0;
 314
 315         if (smscore_get_device_mode(coredev) != 4) {
 316                 printk(KERN_ERR "%sSMS Device mode is not set for "
 317                        "DVB operation.\n", __func__);
 318                 return 0;
 319         }
 320
 321         client = kzalloc(sizeof(smsdvb_client_t), GFP_KERNEL);
 322         if (!client) {
 323                 printk(KERN_INFO "%s kmalloc() failed\n", __func__);
 324                 return -ENOMEM;
 325         }
 326
 327         /* register dvb adapter */
 328         rc = dvb_register_adapter(&client->adapter, "Siano Digital Receiver",
 329                                   THIS_MODULE, device, adapter_nr);
 330         if (rc < 0) {
 331                 printk("%s dvb_register_adapter() failed %d\n", __func__, rc);
 332                 goto adapter_error;
 333         }
 334
 335         /* init dvb demux */
 336         client->demux.dmx.capabilities = DMX_TS_FILTERING;
 337         client->demux.filternum = 32; /* todo: nova ??? */
 338         client->demux.feednum = 32;
 339         client->demux.start_feed = smsdvb_start_feed;
 340         client->demux.stop_feed = smsdvb_stop_feed;
 341
 342         rc = dvb_dmx_init(&client->demux);
 343         if (rc < 0) {
 344                 printk("%s dvb_dmx_init failed %d\n\n", __func__, rc);
 345                 goto dvbdmx_error;
 346         }
 347
 348         /* init dmxdev */
 349         client->dmxdev.filternum = 32;
 350         client->dmxdev.demux = &client->demux.dmx;
 351         client->dmxdev.capabilities = 0;
 352
 353         rc = dvb_dmxdev_init(&client->dmxdev, &client->adapter);
 354         if (rc < 0) {
 355                 printk("%s dvb_dmxdev_init failed %d\n", __func__, rc);
 356                 goto dmxdev_error;
 357         }
 358
 359         /* init and register frontend */
 360         memcpy(&client->frontend.ops, &smsdvb_fe_ops,
 361                sizeof(struct dvb_frontend_ops));
 362
 363         rc = dvb_register_frontend(&client->adapter, &client->frontend);
 364         if (rc < 0) {
 365                 printk("%s frontend registration failed %d\n", __func__, rc);
 366                 goto frontend_error;
 367         }
 368
 369         params.initial_id = 1;
 370         params.data_type = MSG_SMS_DVBT_BDA_DATA;
 371         params.onresponse_handler = smsdvb_onresponse;
 372         params.onremove_handler = smsdvb_onremove;
 373         params.context = client;
 374
 375         rc = smscore_register_client(coredev, &params, &client->smsclient);
 376         if (rc < 0) {
 377                 printk(KERN_INFO "%s smscore_register_client() failed %d\n",
 378                        __func__, rc);
 379                 goto client_error;
 380         }
 381
 382         client->coredev = coredev;
 383
 384         init_completion(&client->tune_done);
 385         init_completion(&client->stat_done);
 386
 387         kmutex_lock(&g_smsdvb_clientslock);
 388
 389         list_add(&client->entry, &g_smsdvb_clients);
 390
 391         kmutex_unlock(&g_smsdvb_clientslock);
 392
 393         printk(KERN_INFO "%s success\n", __func__);
 394
 395         return 0;
 396
 397 client_error:
 398         dvb_unregister_frontend(&client->frontend);
 399
 400 frontend_error:
 401         dvb_dmxdev_release(&client->dmxdev);
 402
 403 dmxdev_error:
 404         dvb_dmx_release(&client->demux);
 405
 406 dvbdmx_error:
 407         dvb_unregister_adapter(&client->adapter);
 408
 409 adapter_error:
 410         kfree(client);
 411         return rc;
 412 }
 413
 414 int smsdvb_register(void)
 415 {
 416         int rc;
 417
 418         INIT_LIST_HEAD(&g_smsdvb_clients);
 419         kmutex_init(&g_smsdvb_clientslock);
 420
 421         rc = smscore_register_hotplug(smsdvb_hotplug);
 422
 423         printk(KERN_INFO "%s\n", __func__);
 424
 425         return rc;
 426 }
 427
 428 void smsdvb_unregister(void)
 429 {
 430         smscore_unregister_hotplug(smsdvb_hotplug);
 431
 432         kmutex_lock(&g_smsdvb_clientslock);
 433
 434         while (!list_empty(&g_smsdvb_clients))
 435                smsdvb_unregister_client(
 436                         (smsdvb_client_t *) g_smsdvb_clients.next);
 437
 438         kmutex_unlock(&g_smsdvb_clientslock);
 439 }